结果表明：锤击处理可明显强化焊接接头，特别是随焊锤击能够明显强化焊趾，提高焊件的强度和塑性。
Results shows that penning in the weakest region of welded joint may strengthen welded toe obviously, and substantially improve ductility and strengthen of weldment.
去除焊缝余高或将焊缝设计在最大剪应力平面内可明显改善对焊接头的疲劳性能。
The fatigue resistance of the butt welds can be improved by means of removing the weld reinforcement and designing the weld in the maximum shear stress plane.
严格控制焊接缺陷可改善整个接头的疲劳性能。
And fatigue property will be improved by controlling weld defects.
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